The data coordinating center, located at Washington University, maintains NARCOMS, the worlds largest voluntary, patient driven MS registry. The registry involves personnel from at least three other sites in the US and Canada (Cleveland Clinic Foundation, University of Alabama at Birmingham, and the University of Manitoba in Canada). Over the past 20 years more than 38,000 people with MS across the U.S., Canada and over 50 other countries, including over 4,000 Veterans, have participated in the registry by submitting their health-related data by mail or online. Registry data have been featured in over 100 peer-reviewed journal articles, scientific posters and presentations. These reports have provided information to guide new research. They also provide evidence supporting the approval of new drugs in the fight against MS.